package com.hxzy.framework.web.security;

import com.hxzy.framework.web.security.filter.JwtAuthenticationTokenFilter;
import com.hxzy.framework.web.security.handler.AuthenticationEntryPointImpl;
import com.hxzy.framework.web.security.handler.LogoutSuccessHandlerImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.web.filter.CorsFilter;

import java.util.ArrayList;
import java.util.List;

/**
 * spring security最核心的配置文件
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class TzxmSpringSecurityConfig extends WebSecurityConfigurerAdapter {

    /**
     * 登录和授权代码
     */
    @Autowired
    private TzxmUserDetailServiceImpl  tzxmUserDetailService;


    /**
     * spring security 未登录认证，或没有权限访问等错误信息，json显示
     */
    @Autowired
    private AuthenticationEntryPointImpl  authenticationEntryPoint;


    /**
     * spring security 用户退出操作,删除redis中的键，输出json
     */
    @Autowired
    private LogoutSuccessHandlerImpl logoutSuccessHandler;


    /**
     * 自定义filter，验证令牌是否有效，把加入spring security自定义拦截器里面
     */
    @Autowired
    private JwtAuthenticationTokenFilter  jwtAuthenticationTokenFilter;

    /**
     * 跨域过滤器
     */
    @Autowired
    private CorsFilter corsFilter;


    /**
     * 解决 无法直接注入 AuthenticationManager
     *
     * @return
     * @throws Exception
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * 强散列哈希加密实现
     */
    @Bean
    public BCryptPasswordEncoder bCryptPasswordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(tzxmUserDetailService).passwordEncoder(bCryptPasswordEncoder());
    }

    /**
     * 配置哪些请求要拦截，哪些请要放行，如何放行
     * anyRequest          |   匹配所有请求路径
     * access              |   SpringEl表达式结果为true时可以访问
     * anonymous           |   匿名可以访问
     * denyAll             |   用户不能访问
     * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
     * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
     * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
     * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
     * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
     * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
     * permitAll           |   用户可以任意访问
     * rememberMe          |   允许通过remember-me登录的用户访问
     * authenticated       |   用户登录后可访问
     */
    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {

        //放行的url
        List<String> excludeUrl=new ArrayList<>();


        //用户请求放行
        excludeUrl.add("/api/login");
        excludeUrl.add("/api/register");
        excludeUrl.add("/common/**");
        excludeUrl.add("/front/**");


        httpSecurity
                // CSRF禁用，因为不使用session
                .csrf().disable()
                // 认证失败处理类
               .exceptionHandling().authenticationEntryPoint(authenticationEntryPoint)
                 .and()
                // 基于token，所以不需要session
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                // 过滤请求
                .authorizeRequests()
                // 对于登录login 注册register 验证码/common 允许匿名访问
                .antMatchers(excludeUrl.toArray(new String[excludeUrl.size()])).anonymous()
                .antMatchers(
                        HttpMethod.GET,
                        "/",
                        "/*.html",
                        "/**/*.html",
                        "/**/*.css",
                        "/**/*.js",
                        "/profile/**"
                ).permitAll()
                .antMatchers("/swagger-ui.html").anonymous()
                .antMatchers("/swagger-resources/**").anonymous()
                .antMatchers("/webjars/**").anonymous()
                .antMatchers("/*/api-docs").anonymous()
                .antMatchers("/druid/**").anonymous()
                // 除上面外的所有请求全部需要鉴权认证
                .anyRequest().authenticated()
                .and()
                .headers().frameOptions().disable();

        //自定义拦截器以及处理器放在spring security拦截器里面
        httpSecurity.logout().logoutUrl("/api/logout").logoutSuccessHandler(logoutSuccessHandler);
        // 添加JWT filter
        httpSecurity.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
        // 添加CORS filter
        httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
        httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
    }
}


